Tapan Kumar Saha

Tapan Kumar Saha
University of Queensland | UQ · School of Information Technology and Electrical Engineering

Bsc Eng, MTech, PhD

About

671
Publications
270,177
Reads
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17,697
Citations
Additional affiliations
January 1996 - December 2004
University of Queensland
Position
  • Lecturer, senior lecturer & Associate Professor
July 2003 - December 2003
University of Newcastle Australia
Position
  • Visiting Fellow
July 1999 - December 1999
KTH Royal Institute of Technology
Position
  • Professor
Education
February 1997 - December 1997
University of Queensland
Field of study
  • Education
July 1989 - June 1993
University of Queensland
Field of study
  • Electrical Engineering
July 1983 - December 1984
Indian Institute of Technology Delhi
Field of study
  • Power Apparatus and Systems(Electrical Engineering)

Publications

Publications (671)
Article
Cyber-physical infrastructure faces threats from evasive false data injection attacks that can significantly impact their security and performance. Adversarial attacks are a popular evasive false data injection threat model that generally targets AI/ML models employed in cyber-physical systems. However, AI/ML models are often not necessary to carry...
Article
The adoption of renewable energy resources, such as solar power, is on the rise. However, the lack of recycling facilities for solar panels in particular poses environmental risks. This article suggests a circular economy (CE) approach to address this issue. By implementing blockchain technology, the end of life (EOL) of solar panels can be tracked...
Article
Retro-filling transformers with ester fluids have been increasingly practiced. Transformers may be retrofilled at different service years. In this paper, the ageing behaviour of the cellulose insulation of transformers retrofilled at different service years (with different conditions of paper insulation) are studied. Since the temperature may rise...
Article
The vast number of assets in low-voltage distribution networks poses a considerable challenge for asset management. Historically, the approach to asset management in distribution feeders has been predominantly passive, which involves either allowing assets to operate until failure or conducting periodic field inspections. The integration of dedicat...
Article
The electrical treeing growth and initiation of Cross-Linked Polyethylene (XLPE) under the influence of harmonics and frequency are considered in this paper. Constant stress tests and step stress tests were conducted on needle electrode specimens to investigate the effect of harmonic order, Total Harmonic Distortion (THD) and frequency. The field d...
Article
This paper presents a new dynamic operating envelope (DOE)-integrated peer-to-peer (P2P) trading scheme to increase the exchange of electricity from prosumers to a distribution network without jeopardising the network constraints. First, a DOE computation mechanism is designed to estimate the power export and import limits for prosumers at differen...
Article
Full-text available
Despite the world’s relentless efforts to achieve the United Nations’ sustainable energy target by 2030, the current pace of progress is insufficient to reach the objective. Continuous support and development across various domains of the energy sector are required to achieve sustainability targets. This article focuses on the potential of dynamic...
Article
A Dynamic Operating Envelope (DOE) specifies the available capacity to import/export power for Distributed Energy Resources (DERs) or connection points of a distribution network in a time interval without violating its physical and operational constraints. This paper proposes a two-stage, top-down approach to allocate DOEs in MV-LV (medium voltage-...
Technical Report
Full-text available
Have you ever wondered how trading electricity with your neighbours, energy companies, and the grid operator could save you money and benefit the environment? With an increasing number of solar panels and energy storage systems in use, this question is becoming more and more relevant. This article presents a case study of a peer-to-peer local energ...
Preprint
Full-text available
An increased energy demand, and environmental pressure to accommodate higher levels of renewable energy and flexible loads like electric vehicles have led to numerous smart transformations in the modern power systems. These transformations make the cyber-physical power system highly susceptible to cyber-adversaries targeting its numerous operations...
Article
Full-text available
With the emergence of the Internet-of-Things (IoT), artificial intelligence, and communication technologies, cyber-physical systems (CPS) have revolutionized the engineering paradigm with profound applications in many aspects of society including homes, energy, agriculture, health-care, transportation, business, and manufacturing. A CPS uses suitab...
Article
Voltage regulation in distribution networks is becoming extremely challenging with the increased penetration of rooftop photovoltaic (PV) generation. Many recent studies demonstrate the effectiveness of power control of smart inverters for voltage regulation purposes. However, how to fully incentivize demand-side participation in voltage regulation...
Article
Dynamic operating envelopes (DOEs) are promising to cater for the strong uptake of distributed energy resources (DERs) in low-voltage (LV) distribution networks while ensuring secure network operation. Under the current framework, DOEs only specify active-reactive power set-points at households' point of connection (POC). In this regard, DOEs do no...
Article
The fast growing penetration of renewable energy sources has led to increasing retirement of conventional power plants, which affects operational stability of electricity networks. Therefore, researchers have proposed virtual synchronous machine (VSM) techniques for inverter-based renewable generators to address the related instability issues. Howe...
Article
Day-ahead electricity consumption forecasting for individual residential consumers, especially the peak consumption time forecasting, is essential for home energy management system. However, it is considerably challenging since the single household consumption is highly volatile and stochastic and dependent on the underlying human behaviour. Furthe...
Article
The large-scale renewable energy integration faces a challenge of frequency stability due to low inertia in weak power grids. One solution to mitigate this issue is via the fast frequency response service provided by battery storage systems so that the overall grid response during a large power outage can be improved. The battery power reserve is c...
Article
Peer-to-peer trading is a potential future-generation energy management mechanism that enables prosumers — electricity consumers who can generate and control their energy — to earn monetary gains. However, the physical deployment of this trading technique in distribution networks — to accommodate prosumers — poses some technical challenges. To addr...
Article
In the past five years, the importance of peer-to-peer (P2P) trading for promoting the use of renewable energy has been demonstrated in many scientific literature and pilot projects. However, a large-scale demonstration of P2P trading in today’s electricity market is yet to be implemented. The reason for this can be partially attributed to two fact...
Article
Transactive Energy (TE) is envisaged as an advanced demand response (DR) variant to leverage the flexibility of distributed energy resources (DERs) for enhancing energy balance and network management in modern power systems. However, there have been limited implementations of TE frameworks for low voltage (LV) residential networks to capture the un...
Article
Partial discharge inception voltage (PDIV) at different frequencies is of great interest for PD tests conducted at nonpower frequency. However, in the existing literature, there is no agreement on PDIV characteristics with respect to frequency. There is a lack of comprehensive analysis of frequency-dependent PDIV characteristics either. In this art...
Article
Driven by the efficient and personalized services and better management of the distribution networks, power utilities are always willing to recognize the household characteristics which reflect the dwelling and social-demographic characteristics of customers. As a key component of the distribution grid monitoring systems, smart meters installed at...
Article
As power systems are gradually evolving into more efficient and intelligent cyber-physical energy systems with the large-scale penetration of renewable energies and information and communication technologies, they become increasingly reliant upon more accurate monitoring and fast control. Phasor Measurement Units (PMUs) collect high-precision Distr...
Article
Full-text available
This paper proposes an algorithmic approach constructed from a convolutional recurrent neural network (CRNN) iterated with examination of extracted features for partial discharge (PD) localisation; tests were conducted offline on medium voltage (MV) power cables. To evaluate the performance of the algorithm, a case study was performed on 7 cables d...
Article
Dynamic line rating (DLR) and flexible ac transmission system (FACTS) are two technologies to enhance the utilization of existing transmission lines and exploit the inherent transmission-side flexibility. This paper coordinates DLR and FACTS in a two-stage security-constrained economic dispatch (SCED) model to enhance the power system flexibility i...
Article
Recently, there has been growing interest in the provision of market services from distributed energy resources (DERs). In pursuing this goal, demand response (DR) aggregators continue to face challenges in retaining privacy and comfort for end-users, mitigating scalability issues while controlling a large cohort of DERs and handling uncertainties...
Article
Full-text available
Effective power quality disturbance (PQD) events recognition is important for electricity network operation. This paper proposes an improved methodology for detecting and classifying multiple PQD events, which may simultaneously occur in the electricity network. It employs an adaptive dual resolution Stockwell‐transform for signal processing and a...
Article
Full-text available
Retrofilling distribution transformers with natural ester has attracted increasing interest among the utilities. Many retrofilled transformers have layered winding structures and natural cooling mode. The thermal performance of such types of transformers has not been thoroughly studied. To ensure the temperature rise in a layered winding type retro...
Article
Uncertainties at end-user and aggregator levels can be highly detrimental to the practical implementation of residential load control schemes for electricity market applications. Uncertainty factors such as end-user non-compliance, comfort violations and load set-point changes associated with the demand response aggregator are unavoidable in practi...
Article
This paper proposes a self-supervised latent space clustering algorithm, called the Deep Latent Space Clustering, for the detection of stealthy false data injection attacks (FDIAs) in smart grids against state estimation algorithms. The stealthy FDI model considered is based on the accurate AC state estimation and is able to bypass conventional bad...
Article
“Source ID Mix” spoofing emerged as a new type of cyber-attack on Distribution Synchrophasors (DS) where adversaries have the capability to swap the source information of DS without changing the measurement values. Accurate detection of such a highly-deceptive attack is a challenging task especially when the spoofing attack happens on short fragmen...
Article
Forecasting of a single household electricity consumption (load) would be very useful for home energy management systems. However, the load forecasting of a single household is challenging due to the unpredictability of the individual household consumption behaviour. In this paper, a consumption scenario-based probabilistic load forecasting (PLF) m...
Article
The electrical treeing of a 33 kV XLPE cable is investigated on a pin-plane electrode system in the frequency range of 50–650 Hz. Cable specimens are created with needle electrodes having a tip radius of 1 µm and a tip distance of 0.75 ± 0.1 mm. Step stress tests are conducted at a step increase of 1 kV peak voltage for step times of 15 seconds and...
Article
Silver sulphide corrosion is a recently identified failure mechanism of transformer on load tap changers (OLTC). The corrosive sulphur in transformer insulating oil reacts with the silver coated components and forms silver sulphide films on silver coating. During the OLTC operation and due to natural leafing, silver sulphide flakes detach and mix i...
Article
This paper proposes a novel data driven framework for detecting topology transitions in a distribution network. The framework analyzes data from phasor measurement units (PMUs) and relies on the fact that changes in network topology results in changes in the structure and admittance of the network. Using voltage and current phasors recorded by PMUs...
Preprint
Full-text available
This paper proposes a distributionally robust optimal power flow (OPF) model for transmission grids with wind power generation. The model uses the conditional value-at-risk (CVaR) constraints to control the reserve and branch flow limit violations caused by wind power forecast errors. Meanwhile, the Gaussian mixture model (GMM) is integrated into t...
Preprint
Full-text available
Despite extensive research in the past five years and several successfully completed and ongoing pilot projects, regulators are still reluctant to implement peer-to-peer trading at a large-scale in today's electricity market. The reason could partly be attributed to the perceived disadvantage of current market participants like retailers due to the...
Article
In this paper, the formation and feasibility of negawatt (nW) peer-to-peer (P2P) energy trading in a grid-connected energy network are studied. In particular, a framework is presented to introduce nW P2P trading concept in the local electricity market in order to provide cost savings to each participating prosumer. To capture the decision-making st...
Article
Full-text available
Despite extensive research in the past five years and several successfully completed and on-going pilot projects, regulators are still reluctant to implement peer-to-peer trading at a large-scale in today’s electricity market. The reason could partly be attributed to the perceived disadvantage of current market participants like retailers due to th...
Article
Full-text available
This paper proposes to administer a multi-step artificial intelligence approach with an ensemble of adaptive neural networks (NNs) trained on 50000 samples to identify partial discharge (PD) diagnostic measurements for in-service medium voltage (MV) power cables. To evaluate the performance of the algorithm, a case study was performed on cables del...
Article
This letter proposes a hybrid approach combining Self-Adaptive Mathematical Morphology (SAMM) and Time-Frequency (TF) techniques to authenticate the source information of Distribution Synchrophasors (DS) within nearrange locations. The SAMM can adaptively regulate the synchrophasors variations which are representatives of local environmental charac...
Article
This article evaluates the feasibility of a double-auction-based Transactive Energy System (TES) for engaging the reactive power (VAR) capability of inverters in a utility-scale photovoltaic (PV) plant for voltage management in distribution feeders. In the proposed approach, a PV plant owner (seller) provides VAR supply curves in terms of price-qua...
Article
This paper proposes a risk-based contingency-constrained optimal power flow (OPF) model by leveraging the methods of both adjustable uncertainty set and distributionally robust optimization. In the proposed model, an adjustable uncertainty set of wind power is developed with network contingencies explicitly incorporated. Based on this uncertainty s...
Article
The sustaining evolution of sensing and advancement in communications technologies have revolutionized prognostics and health management for various electrical equipment towards data-driven ways. This revolution delivers a promising solution for the health monitoring problem of heat pump (HP) system to avoid unexpected downtime. Many HPs were pract...
Preprint
Full-text available
The sustaining evolution of sensing and advancement in communications technologies have revolutionized prognostics and health management for various electrical equipment towards data-driven ways. This revolution delivers a promising solution for the health monitoring problem of heat pump (HP) system, a vital device widely deployed in modern buildin...
Article
In this paper, the feasibility of peer-to-peer (P2P) energy trading in a voltage-constrained grid-connected network is studied. In particular, a local voltage management scheme is proposed that takes network constraints into consideration to instruct the prosumers to trade energy frequently in the P2P market. A coalition graph game-based P2P energy...
Article
Today many large-scale photovoltaic (PV) plants have been equipped with sky imaging systems. The sky images contain abundant spatio-temporal information of the local climate condition at the PV plant. Meanwhile, power outputs of the PV systems located at different sites in a certain geographical area also exhibit spatio-temporal correlation. It is...
Article
In this paper, we propose a one-dimensional convolutional neural network (CNN)-based state of charge estimation algorithm for electric vehicles. The CNN is trained using two publicly available battery datasets. The influence of different types of noises on the estimation capabilities of the CNN model has been studied. Moreover, a transfer learning...
Article
Many solar tracking technologies have been developed with the aim of improving the energy performance of solar PV installations. Among these, single-axis tracking (SAT) systems give good economic prospect for ground-mounted PV plants but experience inevitable power loss when the trackers diverge from the incident solar irradiance during winter. The...
Article
Inverter transformers are one of the key components in a PV plant and their operating patterns are considerably different from that of transformers in a substation. Moreover, these transformers experience higher level of harmonics generated by the inverters. Therefore, investigating the ageing profile of the inverter transformer is a timely require...
Article
As the penetration of roof-top solar photovoltaics (PV) becomes very large, voltage regulation to the power grid via transactive energy has emerged to achieve system security and flexibility. Several recent studies have extensively studied transactive mechanisms that directly control either real or reactive power of the prosumers. However, they fai...
Article
Full-text available
Battery cell temperature is a key parameter in battery life degradation, safety, and dynamic performance. Intense charging-discharging operations and high-ambient temperatures escalate battery cell temperature, which in turn accelerates its degradation. Therefore, accurate battery cell temperature estimation can play a significant role in ensuring...
Article
The reliable moisture determination in a power transformer is still a challenge for utilities and large power transformer operators. The presence of high moisture can cause serious problems, such as severely reducing the remaining useful life and the operational capability of a transformer. The large insulation structure and slow dynamic moisture m...
Preprint
Full-text available
After a century of relative stability of the electricity industry, extensive deployment of distributed energy resources and recent advances in computation and communication technologies have changed the nature of how we consume, trade, and apply energy. The power system is facing a transition from its traditional hierarchical structure to a more de...
Preprint
Full-text available
A state of charge estimator is an essential component of battery management systems used in Electric Vehicles. In the recent years deep learning algorithms have fared well as accurate and reliable state of charge estimators, owing to their high accuracy of estimation under noisy conditions and the relative ease with which they can process large amo...
Article
Full-text available
After a century of relative stability of the electricity industry, extensive deployment of distributed energy resources and recent advances in computation and communication technologies have changed the nature of how we consume, trade, and apply energy. The power system is facing a transition from its traditional hierarchical structure to a more de...
Article
In this paper the effectiveness of transformer oil passivation for preventing silver sulfide corrosion in an on-load tap changer is reported. The effect of different types of corrosive sulfur compounds and their different concentrations in oil on the ability of the passivator to protect silver coated contacts is studied. Changes in oil dielectric p...
Article
With the advancement of the smart grid, the current energy system is moving towards a future where people can buy what they need, can sell when they have excess and can trade the right of buying to other proactive consumers (prosumers). Although the first two schemes already exist in the market, selling the right of buying — also known as negawatt...
Conference Paper
This paper presents an approach to deploy virtu-ally settled peer-to-peer (P2P) energy trading in existing grid-connected networks without considering post-trading protectionschemes that may be required for bus voltage regulation. Toachieve this goal, this paper demonstrates to consider the max-imum power export limit fixed by the network operators...
Article
Full-text available
Due to exponential growth of large-scale PV plants, automatic approaches for PV system protection are gaining prodigious importance. Even with the use of standard protection devices, faults in PV arrays may remain undetected. To address such an important issue, this paper focuses on string level monitoring to develop the functionality of automatic...
Article
Full-text available
This study investigates the overall and local vibration characteristics of disk‐type windings in power transformers. The influence of clamping pressure relaxation and pressboard aging on windings' overall modal characteristics is studied. Individual conductors in a winding can vibrate independently and have the local vibration from that of overall...
Article
Full-text available
Modern inverter-based air-conditioners (IACs) are generally equipped with power-electronic components to achieve higher efficiency and more advanced controllability. Thus, their operating behaviours can be very different from the conventional air-conditioners with direct motor connections, and their new characteristics have not been adequately stud...
Preprint
With the advancement of the smart grid, the current energy system is moving towards a future where people can buy what they need, sell when they have excess, and can trade the right of buying to other prosumers. While the first two schemes already exist in the market, selling the right of buying, also known as negawatt trading, is something that is...
Article
Full-text available
Most existing methods for controlling the energy consumption of air conditioning (AC), focus on either scheduling the switching (on/off) of compressors or optimizing the overall energy consumption of AC system of an entire building. Unlike commercial buildings, residential apartments typically house separate ACs in individual rooms occupied by peop...
Article
Full-text available
This article proposes a novel algorithm employing space vector ellipse (SVE) in a complex plane to classify and visualize power quality disturbance-events (PQDEs). In the proposed method, at first, the time-domain signal and a reference signal, which are separated by 90°, are mapped in a complex 2D coordinates. Thus, the tip of resultant rotating v...
Article
In recent years, there has been a renewed interest in the potential of air interrupters for application in modern medium voltage distribution networks. This paper reviews the range of stresses to which interrupters could be subjected in such networks and shows that there are several potential areas of application for devices interrupting low curren...